body { padding-top: 0; }

.page-banner {
    position: relative;
    min-height: 100vh;
    background: linear-gradient(rgba(30, 30, 60, 0.85), rgba(30, 30, 60, 0.7)), url(../img/szxc_background.png);
    background-size: 100% auto;
    background-position: center top;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    padding: 120px 20px 60px 20px;
}
.page-banner h1 {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.page-banner p {
    font-size: 20px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}
.section-padding { padding: 80px 0; }
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: #333;
    margin-bottom: 16px;
}
.section-title p {
    font-size: 16px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}
.overview-box {
    background: #fff;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.1);
    text-align: left;
}
.overview-box h3 {
    font-size: 28px;
    font-weight: 600;
    color: #333;
    margin-bottom: 24px;
    text-align: center;
}
.overview-box p {
    font-size: 16px;
    color: #555;
    line-height: 2;
    margin-bottom: 20px;
}
.overview-box strong {
    color: #667eea;
}
.arch-box i {
    font-size: 28px;
    margin-bottom: 10px;
    display: block;
}
.arch-box h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}
.arch-box p {
    font-size: 12px;
    margin: 0;
    opacity: 0.9;
    line-height: 1.5;
}
.arch-title h3 {
    font-size: 24px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}
.arch-title p {
    font-size: 14px;
    color: #666;
}
.arch-item i {
    font-size: 20px;
    color: #667eea;
    margin-bottom: 8px;
}
.arch-item span {
    display: block;
    font-size: 13px;
    color: #555;
    font-weight: 500;
}
.feature-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    height: 100%;
    transition: all 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}
.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: #fff;
    font-size: 32px;
}
.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #333;
}
.feature-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}
.highlight-section {
    background: #f8f9fa;
}
.highlight-item {
    display: flex;
    align-items: flex-start;
    padding: 30px;
    background: #fff;
    border-radius: 16px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.highlight-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    flex-shrink: 0;
    color: #fff;
    font-size: 24px;
}
.highlight-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}
.highlight-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    margin: 0;
}
.scenario-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    height: 100%;
    transition: all 0.3s ease;
}
.scenario-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}
.scenario-img {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 48px;
}
.scenario-content {
    padding: 30px;
}
.scenario-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #333;
}
.scenario-content p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}
.stat-row {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 40px;
    flex-wrap: wrap;
}
.stat-item {
    text-align: center;
}
.stat-number {
    font-size: 42px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label {
    font-size: 14px;
    color: #666;
    margin-top: 8px;
}
.cta-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
    text-align: center;
    color: #fff;
}
.cta-section h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
}
.cta-section p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}
.btn-white {
    background: #fff;
    color: #667eea;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}
.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    color: #667eea;
}
/* === 架构图图片容器样式 === */
.architecture-image-wrapper {
    position: relative;
    background: #fff;
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    margin-bottom: 40px;
}

.architecture-image-wrapper::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 4px 4px 0 0;
}

.architecture-image-wrapper img {
    display: block;
    width: 100%;
    max-width: 100%;
    border-radius: 16px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: zoom-in;
    margin: 0 auto; /* ✅ 关键：强制水平居中 */
}

.architecture-image-wrapper img:hover {
    transform: scale(1.015);
    box-shadow: 0 12px 35px rgba(0,0,0,0.12);
}

/* 大屏下：允许图片略宽于容器（但依然居中） */
@media (min-width: 1200px) {
    .architecture-image-wrapper {
        padding: 32px;
    }
    .architecture-image-wrapper img {
        max-width: 110%;
    }
}

/* 小屏适配 */
@media (max-width: 768px) {
    .architecture-image-wrapper {
        padding: 16px;
    }
    .architecture-image-wrapper img {
        max-width: 100%;
        border-radius: 12px;
        margin: 0 auto;
    }
}

/* === 紧凑型应用场景卡片 === */
.scenario-card.compact {
    height: auto;
    min-height: unset;
}
.scenario-card.compact .scenario-img {
    height: 120px; /* 从 200px → 120px */
    font-size: 36px; /* 图标略小 */
}
.scenario-card.compact .scenario-content {
    padding: 16px 12px; /* 内边距减半 */
}
.scenario-card.compact .scenario-content h3 {
    font-size: 16px; /* 标题缩小 */
    margin-bottom: 0;
}
/* 小屏下两列 */
@media (max-width: 768px) {
    .scenario-card.compact .scenario-img {
        height: 100px;
        font-size: 32px;
    }
    .scenario-card.compact .scenario-content {
        padding: 12px 8px;
    }
    .scenario-card.compact .scenario-content h3 {
        font-size: 14px;
    }
}